xref: /onnv-gate/usr/src/uts/common/fs/zfs/sys/dmu_tx.h (revision 11935:538c866aaac6)
1789Sahrens /*
2789Sahrens  * CDDL HEADER START
3789Sahrens  *
4789Sahrens  * The contents of this file are subject to the terms of the
51544Seschrock  * Common Development and Distribution License (the "License").
61544Seschrock  * You may not use this file except in compliance with the License.
7789Sahrens  *
8789Sahrens  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9789Sahrens  * or http://www.opensolaris.org/os/licensing.
10789Sahrens  * See the License for the specific language governing permissions
11789Sahrens  * and limitations under the License.
12789Sahrens  *
13789Sahrens  * When distributing Covered Code, include this CDDL HEADER in each
14789Sahrens  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15789Sahrens  * If applicable, add the following below this CDDL HEADER, with the
16789Sahrens  * fields enclosed by brackets "[]" replaced with your own identifying
17789Sahrens  * information: Portions Copyright [yyyy] [name of copyright owner]
18789Sahrens  *
19789Sahrens  * CDDL HEADER END
20789Sahrens  */
21789Sahrens /*
22*11935SMark.Shellenbaum@Sun.COM  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
23789Sahrens  * Use is subject to license terms.
24789Sahrens  */
25789Sahrens 
26789Sahrens #ifndef	_SYS_DMU_TX_H
27789Sahrens #define	_SYS_DMU_TX_H
28789Sahrens 
29789Sahrens #include <sys/inttypes.h>
30789Sahrens #include <sys/dmu.h>
31789Sahrens #include <sys/txg.h>
32789Sahrens #include <sys/refcount.h>
33789Sahrens 
34789Sahrens #ifdef	__cplusplus
35789Sahrens extern "C" {
36789Sahrens #endif
37789Sahrens 
38789Sahrens struct dmu_buf_impl;
392113Sahrens struct dmu_tx_hold;
40789Sahrens struct dnode_link;
41789Sahrens struct dsl_pool;
42789Sahrens struct dnode;
43789Sahrens struct dsl_dir;
44789Sahrens 
45789Sahrens struct dmu_tx {
46789Sahrens 	/*
47789Sahrens 	 * No synchronization is needed because a tx can only be handled
48789Sahrens 	 * by one thread.
49789Sahrens 	 */
50789Sahrens 	list_t tx_holds; /* list of dmu_tx_hold_t */
51789Sahrens 	objset_t *tx_objset;
52789Sahrens 	struct dsl_dir *tx_dir;
53789Sahrens 	struct dsl_pool *tx_pool;
54789Sahrens 	uint64_t tx_txg;
551544Seschrock 	uint64_t tx_lastsnap_txg;
562113Sahrens 	uint64_t tx_lasttried_txg;
57789Sahrens 	txg_handle_t tx_txgh;
58789Sahrens 	void *tx_tempreserve_cookie;
592113Sahrens 	struct dmu_tx_hold *tx_needassign_txh;
6010612SRicardo.M.Correia@Sun.COM 	list_t tx_callbacks; /* list of dmu_tx_callback_t on this dmu_tx */
61789Sahrens 	uint8_t tx_anyobj;
621544Seschrock 	int tx_err;
63789Sahrens #ifdef ZFS_DEBUG
642113Sahrens 	uint64_t tx_space_towrite;
652113Sahrens 	uint64_t tx_space_tofree;
662113Sahrens 	uint64_t tx_space_tooverwrite;
675378Sck153898 	uint64_t tx_space_tounref;
682113Sahrens 	refcount_t tx_space_written;
692113Sahrens 	refcount_t tx_space_freed;
70789Sahrens #endif
71789Sahrens };
72789Sahrens 
73789Sahrens enum dmu_tx_hold_type {
74789Sahrens 	THT_NEWOBJECT,
75789Sahrens 	THT_WRITE,
76789Sahrens 	THT_BONUS,
77789Sahrens 	THT_FREE,
78789Sahrens 	THT_ZAP,
79789Sahrens 	THT_SPACE,
80*11935SMark.Shellenbaum@Sun.COM 	THT_SPILL,
81789Sahrens 	THT_NUMTYPES
82789Sahrens };
83789Sahrens 
84789Sahrens typedef struct dmu_tx_hold {
852113Sahrens 	dmu_tx_t *txh_tx;
862113Sahrens 	list_node_t txh_node;
872113Sahrens 	struct dnode *txh_dnode;
882113Sahrens 	uint64_t txh_space_towrite;
892113Sahrens 	uint64_t txh_space_tofree;
902113Sahrens 	uint64_t txh_space_tooverwrite;
915378Sck153898 	uint64_t txh_space_tounref;
926992Smaybee 	uint64_t txh_memory_tohold;
937016Smaybee 	uint64_t txh_fudge;
942113Sahrens #ifdef ZFS_DEBUG
952113Sahrens 	enum dmu_tx_hold_type txh_type;
962113Sahrens 	uint64_t txh_arg1;
972113Sahrens 	uint64_t txh_arg2;
982113Sahrens #endif
99789Sahrens } dmu_tx_hold_t;
100789Sahrens 
10110612SRicardo.M.Correia@Sun.COM typedef struct dmu_tx_callback {
10210612SRicardo.M.Correia@Sun.COM 	list_node_t		dcb_node;    /* linked to tx_callbacks list */
10310612SRicardo.M.Correia@Sun.COM 	dmu_tx_callback_func_t	*dcb_func;   /* caller function pointer */
10410612SRicardo.M.Correia@Sun.COM 	void			*dcb_data;   /* caller private data */
10510612SRicardo.M.Correia@Sun.COM } dmu_tx_callback_t;
106789Sahrens 
107789Sahrens /*
108789Sahrens  * These routines are defined in dmu.h, and are called by the user.
109789Sahrens  */
110789Sahrens dmu_tx_t *dmu_tx_create(objset_t *dd);
111789Sahrens int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how);
112789Sahrens void dmu_tx_commit(dmu_tx_t *tx);
113789Sahrens void dmu_tx_abort(dmu_tx_t *tx);
114789Sahrens uint64_t dmu_tx_get_txg(dmu_tx_t *tx);
1152113Sahrens void dmu_tx_wait(dmu_tx_t *tx);
116789Sahrens 
11710612SRicardo.M.Correia@Sun.COM void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func,
11810612SRicardo.M.Correia@Sun.COM     void *dcb_data);
11910612SRicardo.M.Correia@Sun.COM void dmu_tx_do_callbacks(list_t *cb_list, int error);
12010612SRicardo.M.Correia@Sun.COM 
121789Sahrens /*
122789Sahrens  * These routines are defined in dmu_spa.h, and are called by the SPA.
123789Sahrens  */
124789Sahrens extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg);
125789Sahrens 
126789Sahrens /*
127789Sahrens  * These routines are only called by the DMU.
128789Sahrens  */
1292199Sahrens dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd);
130789Sahrens int dmu_tx_is_syncing(dmu_tx_t *tx);
131789Sahrens int dmu_tx_private_ok(dmu_tx_t *tx);
132789Sahrens void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object);
133789Sahrens void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta);
134789Sahrens void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db);
135789Sahrens int dmu_tx_holds(dmu_tx_t *tx, uint64_t object);
136789Sahrens void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space);
137789Sahrens 
138789Sahrens #ifdef ZFS_DEBUG
139873Sek110237 #define	DMU_TX_DIRTY_BUF(tx, db)	dmu_tx_dirty_buf(tx, db)
140789Sahrens #else
141873Sek110237 #define	DMU_TX_DIRTY_BUF(tx, db)
142789Sahrens #endif
143789Sahrens 
144789Sahrens #ifdef	__cplusplus
145789Sahrens }
146789Sahrens #endif
147789Sahrens 
148789Sahrens #endif	/* _SYS_DMU_TX_H */
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